/*  Starshatter OpenSource Distribution
    Copyright (c) 1997-2004, Destroyer Studios LLC.
    All Rights Reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name "Destroyer Studios" nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.

    SUBSYSTEM:    Stars.exe
    FILE:         QuantumView.cpp
    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    View class for Quantum Destination HUD Overlay
*/

#include "MemDebug.h"
#include "QuantumView.h"
#include "QuantumDrive.h"
#include "HUDView.h"
#include "Ship.h"
#include "Element.h"
#include "Sim.h"
#include "StarSystem.h"
#include "FormatUtil.h"

#include "Color.h"
#include "Window.h"
#include "Video.h"
#include "Screen.h"
#include "DataLoader.h"
#include "Scene.h"
#include "Font.h"
#include "FontMgr.h"
#include "Keyboard.h"
#include "Mouse.h"
#include "Game.h"
#include "Menu.h"

static Color  hud_color = Color::Black;

// +====================================================================+
//
// QUANTUM DRIVE DESTINATION MENU:
//

static Menu*         quantum_menu   = 0;
static bool          show_menu      = false;

void
QuantumView::Initialize()
{
    static int initialized = 0;
    if (initialized) return;

    quantum_menu = new(__FILE__,__LINE__) Menu(Game::GetText("QuantumView.menu"));

    initialized = 1;
}

void
QuantumView::Close()
{
    delete quantum_menu;
}

// +====================================================================+

QuantumView* QuantumView::quantum_view = 0;

QuantumView::QuantumView(Window* c)
: View(c), sim(0), ship(0), font(0)
{
    quantum_view  = this;
    sim         = Sim::GetSim();

    width       = window->Width();
    height      = window->Height();
    xcenter     = (width  / 2.0) - 0.5;
    ycenter     = (height / 2.0) + 0.5;
    font        = FontMgr::Find("HUD");

    HUDView* hud = HUDView::GetInstance();
    if (hud)
    SetColor(hud->GetTextColor());
}

QuantumView::~QuantumView()
{
    quantum_view = 0;
}

void
QuantumView::OnWindowMove()
{
    width       = window->Width();
    height      = window->Height();
    xcenter     = (width  / 2.0) - 0.5;
    ycenter     = (height / 2.0) + 0.5;
}

// +--------------------------------------------------------------------+

bool
QuantumView::Update(SimObject* obj)
{
    if (obj == ship)
    ship = 0;

    return SimObserver::Update(obj);
}

const char*
QuantumView::GetObserverName() const
{
    return "QuantumView";
}

// +--------------------------------------------------------------------+

void
QuantumView::Refresh()
{
    sim = Sim::GetSim();

    if (sim && ship != sim->GetPlayerShip()) {
        ship = sim->GetPlayerShip();

        if (ship) {
            if (ship->Life() == 0 || ship->IsDying() || ship->IsDead()) {
                ship = 0;
            }
            else {
                Observe(ship);
            }
        }
    }

    if (IsMenuShown()) {
        Rect menu_rect(width-115, 10, 115, 12);

        font->SetColor(hud_color);
        font->SetAlpha(1);
        font->DrawText(quantum_menu->GetTitle(), 0, menu_rect, DT_CENTER);

        menu_rect.y += 15;

        ListIter<MenuItem> item = quantum_menu->GetItems();
        while (++item) {
            item->SetEnabled(true);

            font->DrawText(item->GetText(), 0, menu_rect, DT_LEFT);
            menu_rect.y += 10;
        }
    }
}

// +--------------------------------------------------------------------+

void
QuantumView::ExecFrame()
{
    HUDView* hud = HUDView::GetInstance();
    if (hud) {
        if (hud_color != hud->GetTextColor()) {
            hud_color = hud->GetTextColor();
            SetColor(hud_color);
        }
    }

    static double time_til_change = 0;

    if (time_til_change > 0)
    time_til_change -= Game::GUITime();

    if (time_til_change <= 0) {
        time_til_change = 0;

        if (show_menu) {
            QuantumDrive* quantum_drive = 0;

            if (ship)
            quantum_drive = ship->GetQuantumDrive();

            if (quantum_drive && quantum_drive->ActiveState() != QuantumDrive::ACTIVE_READY) {
                show_menu = false;
                return;
            }

            int max_items = quantum_menu->NumItems();

            for (int i = 0; i < max_items; i++) {
                if (Keyboard::KeyDown('1' + i)) {
                    MenuItem* item = quantum_menu->GetItem(i);
                    if (item && item->GetEnabled()) {

                        SimRegion*  rgn = (SimRegion*) item->GetData();

                        if (rgn) {
                            quantum_drive->SetDestination(rgn, Point(0,0,0));
                            quantum_drive->Engage();
                        }

                        show_menu = false;
                        time_til_change = 0.3;
                        break;
                    }
                }
            }
        }
    }
}

// +--------------------------------------------------------------------+

void
QuantumView::SetColor(Color c)
{
    hud_color = c;
}

// +--------------------------------------------------------------------+

bool
QuantumView::IsMenuShown()
{
    return show_menu;
}

void
QuantumView::ShowMenu()
{
    if (!ship) return;

    if (!show_menu) {
        if (ship->IsStarship() && ship->GetQuantumDrive()) {
            GetQuantumMenu(ship);
            show_menu = true;
        }

        for (int i = 0; i < 10; i++) {
            if (Keyboard::KeyDown('1' + i)) {
                // just need to clear the key down flag
                // so we don't process old keystrokes
                // as valid menu picks...
            }
        }
    }
}

void
QuantumView::CloseMenu()
{
    show_menu = false;
}

// +--------------------------------------------------------------------+

Menu*
QuantumView::GetQuantumMenu(Ship* s)
{
    if (s && sim) {
        if (s->IsStarship()) {
            quantum_menu->ClearItems();

            SimRegion*  current_region = ship->GetRegion();

            if (!current_region) return 0;

            StarSystem* current_system = current_region->System();

            List<SimRegion> rgn_list;

            ListIter<SimRegion> iter = sim->GetRegions();
            while (++iter) {
                SimRegion*  rgn = iter.value();
                StarSystem* rgn_system = rgn->System();

                if (rgn != ship->GetRegion() && !rgn->IsAirSpace() &&
                        rgn_system == current_system) {
                    rgn_list.append(rgn);
                }
            }

            // sort local regions by distance from star:
            rgn_list.sort();

            // now add regions in other star systems:
            iter.reset();
            while (++iter) {
                SimRegion*  rgn = iter.value();
                StarSystem* rgn_system = rgn->System();

                if (rgn != ship->GetRegion() && rgn->Type() != SimRegion::AIR_SPACE && 
                        rgn_system != current_system && current_region->Links().contains(rgn)) {
                    rgn_list.append(rgn);
                }
            }

            int n = 1;
            iter.attach(rgn_list);
            while (++iter) {
                SimRegion*  rgn = iter.value();
                StarSystem* rgn_system = rgn->System();
                char text[64];

                if (rgn_system != current_system)
                sprintf_s(text, "%d. %s/%s", n++, rgn_system->Name(), rgn->Name());
                else
                sprintf_s(text, "%d. %s", n++, rgn->Name());

                quantum_menu->AddItem(text, (DWORD) rgn);
            }

            return quantum_menu;
        }
    }

    return 0;
}
